Skipping AX test related to input types

This AX tests are failing because chromium side dependancy is yet to be
merged.

BUG=418486

Review URL: https://codereview.chromium.org/619473002

Cr-Commit-Position: refs/heads/master@{#297384}

content/test/data/accessibility/input-time-expected-win.txt

+#<skip -- Chromium Dependancy>
 ROLE_SYSTEM_DOCUMENT READONLY FOCUSABLE
     IA2_ROLE_SECTION READONLY
         ROLE_SYSTEM_CLIENT FOCUSABLE

content/test/data/accessibility/input-types-expected-win.txt

+#<skip -- Chromium Dependancy>
 ROLE_SYSTEM_DOCUMENT READONLY FOCUSABLE
     IA2_ROLE_SECTION READONLY
         IA2_ROLE_LABEL